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Finding the Fourth Proportional to 702,253,977.84, 969,110,573.58 and 389,008,480.68

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Solution

The fourth proportional to 702,253,977.84, 969,110,573.58 and 389,008,480.68 is: 536,831,749.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,253,977.84 : 969,110,573.58 = 389,008,480.68 : x
  2. Step 2: Convert to fraction form
    702,253,977.84/969,110,573.58 = 389,008,480.68/x
  3. Step 3: Cross multiply
    702,253,977.84x = 969,110,573.58 × 389,008,480.68
  4. Step 4: Simplify right side
    702,253,977.84x = 376,992,231,839,279,168
  5. Step 5: Solve for x
    x = 376,992,231,839,279,168/702,253,977.84
  6. Step 6: Final answer
    x = 536,831,749.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.